Refractory arch construction



May 27, 1930. B. DOBIE 1,760,121

REFRACTORY ARCH CONSTRUCTION Filed Oct. 26 1923 3 Sheets-Sheet '1 ATTORNE Y5 May 27, 1930. B. DOBIE REFRACTORY ARCH CONSTRUCTION Filed Oct.26, 19 23 3 SheetsSheet 2 11v VEN TOR Iiflh A TTORNE vs May 27, 1930. B.DOBIE 1,760,121

REFRACTORY ARCH CONSTRUCT I ON Filed Oct. 26, 1923 5 Sheets-Sheet 3Fatented l t lay 27, 1939- train unite stares earanr rates BRADLEYDOBIE, 0F

ELMHURST NEW YORK, ASSIGNOR TO AMERICAN ARCH COM- PANY, A CORPORATION OFDELAWARE -REFR-A CTORY ARCH CONSTRUCTION Application filed October 26,1923. Serial No. 671,058.

My invention relates to refractory arch construction, and is applicable,in particular, to steam boiler furnaces. It is especially concerned withthe support of the arch. I aim to make the construction simple andrugged, and to provide for easy replacement of the brick of the archwhen desired. In the particular construction embodying the inventionwhich I have here illustrated, any brick in the arch can be removed andreplaced at will without material disturbance of other brick, or of thesupporting structure.

How these and otheradvantages can be realized through my invention willappear from my description hereinafter of the'bestembodiment of theinvention known to me.

In the drawings, Fig. 1 shows a longitudinal section through a furnacearch constructed in accordance with my invention.

Fig. 2 is a fragmentary transverse sectionalview taken as indicated bythe line 22 in Fig. 1, and diagrammatically illustrating the removalofan arch brick.

Fig. 3-is a fragmentary sectional view simi-,

lar to Fig. 1, but on alarger scale, illustrating details of the archsupporting structure.

, Fig. 4 is a fragmentary view, partly in section as indicated by theline 4-'4 in Fig. 1, illustrating especially the ignition portion of thearch. V

Fig. 5 is afragmentary tional view taken as indicated by the line 55 inFig. 1, illustrating the constructionof the arch nose.

Referring to Figs. 1, 2, 3 and 4, it will be seen that the main portion7 of the arch comprises refractory bungs of hung brick 8 and fillerbrick 9 extending lengthwise of the furnace, from the ignition portion10 of the arch 1 to the nose 11. The brick 8 are engaged and supportedby longitudinal runners 12 themselves suspended by hangers13 from crossbeams 14 shown as resting on or built into the side wall 15 of thefurnace (Fig. 4). The brick 9 may be supported by the brick 8 throughany suitable form of engagement, such as the shoulder and rabbetconformation indicated at 16.

As here shown (Figs. 1 and 4) the ignition 10 comprises brick 17arranged fantailwise transverse see with their undercut heads 18 engagedby lateral flanges 19 on sector shaped supporting plates 20 secured byclamps 21 to cross beams 22, and also fantail sets of filler brick 23 arranged between the brick 17 and supported by them. The rear of thefantail sets 17, 23 is closed off by brick 24 resting on'the brick 17,23 and engaged with lateral lugs 25 on the plates 20. The overlyingrefractory. structure 26 is supported by the beams 22 and by extensions27 projecting from the plates 20. Brick 24 resting on the sets 17, 23close the space between them and the structure 26' through which thebrick 17, 23'are inserted and removed. The construction of the nose 11is substantially the same, except that the plates 20 are suspended fromtheir beams 22 by hangers 29, and the projections 27. are made separateto facilitate their renewal when burned out; also, the plates 20 arebolted to the corresponding ends of the runners 12. Preferably, thereare openings through thev ly undercut or shouldered heads 31 between vthe channels 12, resting on their lower flanges. The hangers 13 (Figs. 2and 3) comprise devices 33 secured to the runners 12 of each )air andholding them properly spaced, and also devices 34 engaging the opposedlower flanges of the transverse I beam supports 14. In the presentinstance, the devices 33 have the character of clamps, consisting ofplates '36 with their end'sengaged beneath the upper flanges of thechannels 12 and longer plates 37 bolted to the plates 36, with their(lownturned ends engaged over the outsides or backs of the channels 12,while the devices 34 have the character of hooks or grapples,

pivoted together and to upstanding lugs 38' on the clamp plates 37 bybolts 39. As indicated in Figs. 2 and 8, the .pivoted ends of thegrapples 34 are forked to embrace the lug 38. As shown in Fig. 1, clampdevices 33 without grapples serve to space and secure together thechannels 12 at their nose ends, and also to space and secure the channelbeams 22. v 1

With a suitable interval between the channels 12 of each pair, any oneor more of the brick 8 can be removed and replaced without disturbanceof the'others or of the channels themselves. Preferably, this isaccomplished without provision of any auxiliary supporting means tonarrow the interval between the channels, by so proportioning'the brickheads 31 and their necks 41 that the brick 8 can be shifted laterallyenough to permit the corner or shoulder 42 of the head to be swung downpast the channel flange on which it formerly rested,as indicated indotted lines in Fig. 2. As shown in this figure, one of the shoulders 42is wider than the other, to permit the brick 8 to be shifted in thatdirection far enough for this purpose. Normally, such lateraldisplacement of the brick 8 can be prevented by any suitable meanslaterally engaging them, preferably below the head 31. In the presentinstance, the filler brick 9 themselves serve this purpose.

I claim:

1-. A refractory arch construction comprising spaced runners, and brickwith unequal shoulders resting on said runners removable after lateraldisplacement in the. direction of the wide shoulders.

2. In a refractory arch construction, the combination of alternatecourses of hung and filler brick and pairs ofspacedrunners forsupporting each course of said hung brick, said hung brick having headsengaging said runners and being removable transversely of said runners,after removal of filler brick on one side, by lateral displacementtoward that side. i

3. In an arch construction, the combination of alternate courses of hungand filler brick and supporting runners for said hung brick, said hungbrick being removable from the runners transversely and toward one sidethereof after removal of the filler brick on that side.

4. In a refractory arch construction, the v combination of alternatecourses of hung and filler brick and pairs of spaced runners forsupporting each course of said hung brick,

said hung brick having heads with unequal shoulders engaging saidrunners and being removable transversely of the runners, after removalof adjacent filler brick, by lateral displacement in the direction ofthe wide shoulders' 5. In a refractory arch construction the combinationof a pair of spaced runners, bricks with heads each sustaininglyengaging said runners, but removable from between.

said runners transversely thereof without disturbing bricks adjacentthereto longitudinally of the runners, and means for normally preventingsuch removal.

In testimony whereof, I have hereunto signed my name.

BRADLEY DOBIE.

